Duplicate Checker Portable With Duplicate Checker you can quickly find and remove duplicate images, audio files, documents and other files from your hard drive. It efficiently finds duplicate files and presents the results in a list that allows you to select and delete duplicates. Duplicate Checker has an image preview function and a built-in player for playing audio files before deleting them. The program can search for files with the same name, size and content. In addition, Duplicate Checker allows you to filter files by date, size and extension.